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#41
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Just an update for anyone following this thread. I tried the pvc lower half
with good results. I just did a very loose spiral of copper wire around the pvc. I was wrong on a couple of things, though. The antenna in the picture has 12" of copper pipe at the bottom, not 18". The pvc section was 18". Anyway, there was no difference in performance but it's still not flexible enough for the trunk mount. The other thing I did was compare it to a trunk-mounted 3 ft. antenna by antenna specialists. The 2 signal reports I got showed that my antenna won. The numbers I got from 2 people in different directions were 5 and 2 db on my antenna and 2 .5 and 1 on the Antenna Specialists. It's up rather close to the rear window. I wonder if either antenna would do better closer to the back of the trunk. Chris "Chris" wrote in message nk.net... I have constructed a homeade antenna that is mounted on a trunk-lip mount on a Nissan Sentra. The bottom is 18" of 1/2" copper pipe with a 3/8" theaded adapter soldered in the bottom. There is a 9" long peice of pvc with a 2" diameter 6ga. copper coil around it. Then there is 4" more copper pipe with a 3ft' stainless tip on top. The problem is that it would be too easy to bend the trunk with copper pipe. I thought about a spring but then the whole thing would bend too much when the trunk is opened. If I move the coil down below roof level, the SWR goes way up. I thought about using pvc for the lower part but I can't quite figure out how to construct it. I may take some pictures of what I have. Stay tuned...... |
#42
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#43
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![]() Many times...........even tested them. Sorry your tests results were debunked by Frank in the xterminator thread, you are a voodoo tech Frank never tested any of the antennas. Frank as well as you still believes the earth is flat. |
#44
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#46
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On Tue, 15 Jun 2004 05:10:57 -0400, wrote:
On 14 Jun 2004 19:53:19 -0700, (I Am Not George) wrote: wrote: Huh......... A bent over 9 foot whip has a very noticeable Loss compared to a efficient 4 or 5 foot vertical. how do you know have you modeled it hoople head? Many times...........even tested them. Sorry your tests results were debunked by Frank in the xterminator thread, you are a voodoo tech In your opinion. The subject has nothing to do with that. It has to do with a bent over antenna becoming a poor antenna. Yeah, if you really want to improve the efficiency of your antenna, bend it over and put the high voltage node close to a large mass of metal. LOL. |
#47
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On Tue, 15 Jun 2004 08:00:56 -0500, itoldyouiamnotiamnotgeorge
wrote: Lancer wrote in news:4drtc0tu0hje27kmlo8lgcqkhqhgmk5k68@ 4ax.com: Yeah, if you really want to improve the efficiency of your antenna, bend it over and put the high voltage node close to a large mass of metal. LOL. What do you think happens when you drive down the road with a coil antenna, the whip folds back and almost touches itself. Well mine doesn't and a decent antenna would have a stiff enough whip not to do that. He was talking about bending it over like the "Barney Phife" mobile. |
#48
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On Tue, 15 Jun 2004 08:01:39 -0500, itoldyouiamnotiamnotgeorge
wrote: Lancer wrote in news:nartc0lgg15n6sbnhpalkg87uup40v96o8@ 4ax.com: Not really, have you tested any antennas? I have tested many antennas , have you? Yes, very many. I thought I was responding to I Am Not George. Too many Georges around here to keep track of.. |
#49
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(itoldyouiamnotiamnotgeorge)itoldyouiamnotiamnotge wrote:
Lancer wrote in news:nartc0lgg15n6sbnhpalkg87uup40v96o8@ 4ax.com: Not really, have you tested any antennas? I have tested many antennas , have you? take it away lil bro, ROTFLMMFAO |
#50
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Lancer wrote in message . ..
On Tue, 15 Jun 2004 05:10:57 -0400, wrote: On 14 Jun 2004 19:53:19 -0700, (I Am Not George) wrote: wrote: Huh......... A bent over 9 foot whip has a very noticeable Loss compared to a efficient 4 or 5 foot vertical. how do you know have you modeled it hoople head? Many times...........even tested them. Sorry your tests results were debunked by Frank in the xterminator thread, you are a voodoo tech In your opinion. The subject has nothing to do with that. It has to do with a bent over antenna becoming a poor antenna. Yeah, if you really want to improve the efficiency of your antenna, bend it over and put the high voltage node close to a large mass of metal. LOL. I didnt say the whip was close to a large mass of metal I said bent over like a bow and that means in free space, assteroid. |
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